摘要
部分城区河道具有纳污功能,且与居民接触密切,近年来城区河道污染及潜在生态风险越来越引起人们关注.以安庆怀宁县两条城区纳污河道(河流Y、河流Q)作为研究对象,分别对2条河道10个点位河道底泥进行采样,测定分析9种重金属(锰、铬、镍、铜、砷、镉、汞、铅、锌)的含量特征.结果表明,河流Y底泥中重金属铅污染最为严重,浓度为918.27 mg/kg;河流Q底泥中汞浓度最高为0.124 mg/kg,并采用潜在生态危害指数法对重金属污染状况进行评价,结果表明:河流Y底泥重金属潜在生态风险顺序为:铅>汞>镍>锰>铜>锌>铬,河流Q底泥重金属潜在生态风险顺序为:汞>镍>铜>锰>铅>铬>锌.河流Y重金属污染较河流Q严重,两条河道都处于中等程度的潜在生态风险状态.
In recent years,the pollution and potential ecological risks of urban river courses have attracted more and more attention.In this study,sediment samples were collected at 10 points in two river channels(river Y and river Q)in two urban areas of Huaining county,Anqing,to determine and analyze the content characteristics of 9 heavy metals(Mn,Cr,Ni,Cu,As,Cd,Hg,Pb and Zn).The results showed that the heavy metal Pb pollution was the most serious in river Y sediment,with the concentration of 918.27 mg/kg.The highest Hg concentration in river Q sediment was 0.124 mg/kg.The potential ecological hazard index method was used to evaluate the pollution status of heavy metals.The results showed that the order of potential ecological risk of heavy metals in river Y sediment was Pb>Hg>Ni>Mn>Cu>Zn>Cr,and river Q was Hg>Ni>Cu>Mn>Pb>Cr>Zn.Heavy metal pollution in river Y is more serious than that in river Q,and both rivers are in a medium degree of potential ecological risk.
作者
颜浩
李法松
邓力
石欢
周子为
YAN Hao;LI Fa-song;DENG Li;SHI Huan;ZHOU Zi-wei(College of Resources and Environment,Anqing Normal University,Anqing 246133,China)
出处
《安徽化工》
CAS
2020年第4期85-89,共5页
Anhui Chemical Industry
基金
安徽省自然科学基金(1708085MB40)
安徽省新工科项目(2017xgkxm34)
安徽省高校优秀拔尖人才培育资助一般项目(gxyq2018033)
2019质量工程项目(2019zyrc077,2019jyxm1228)。
关键词
重金属
潜在生态危害指数法
底泥
河道
heavy metals
potential ecological risk assessment
sedinent
river
